In cities, suburbs and villages all over the world, we are using light in inefficient ways. This wastes money and energy, harms our health and our environment and robs us of the stars. Paul Bogard will discuss the wonder of a dark night sky, the issue of light pollution and some possible solutions. He is the author of The End of Night: Searching for Natural Darkness in an Age of Artificial Light and an assistant professor of creative writing and environmental literature at James Madison University in Virginia.